中一MATH一題

(xy)乘(2xy二次)=?

(xy) X (2xy^2)
= 2x^2y^3

2013-04-02 17:11:33 補充：
2 X x^2 X y^3

( xy ) 乘 ( 2xy二次 )=

2x²y²

2013-04-10 19:25:44 補充：
2x²y³

你好~~

(xy)乘(2xy二次)=?
-----------------------------------------------------------------------------------------------------------------
(xy) x 2xy²
=2x¹+¹y²+¹
=2x²y³

答案: 2x²y³

xy * 2xy^ 2
= 2x ^2 y^3

a^n * a^m
= a ^(n+m)

(xy) x 2xy²
=(xy)乘(2xy二次)
=2乘x二次乘y三次

2xy(2)
=4xy

(xy) x 2xy²

=2x²y^3